Sector Seven (第七機関, Dai-nana Kikan) is a small confederation of like-minded scientists who reject the use of Ars Magus in favor of science and technology. They consider themselves the opposite of the Librarium.
- Kokonoe (Chief Scientist) (Mission Control)
- Iron Tager (Field Operative)
- Makoto Nanaya (Field Operative) (Formerly NOL)
Characters who've been shown to work with Sector Seven but are not full-fledged members of the organization.
- Ragna the Bloodedge (Received a prosthetic left arm from Kokonoe)
- Jin Kisaragi (Formerly NOL)
- Jubei (he is allied because of his daughter, Kokonoe)
- Noel Vermillion (Formerly NOL)
- Litchi Faye-Ling (Scientist) (Defected to NOL)
- Lotte Carmine (Scientist) (Deserted)
- Lambda-11 (Field Operative) (Deceased)
- Relius Clover (Worked with Kokonoe to create Nirvana and Ignis long time ago) (defected to NOL)